Inclusion Criteria: This study will use a sample consisting of 36, English-speaking and English-reading, older male and female adults (ages 60-85 years) with chronic low back pain, i.e. pain of greater than 3 months duration. During the examination, potential participants must have 2/4 of the following for inclusion, based on previous work by Hicks et al, which outlined clinical predictors of success with a trunk muscle stabilization exercise program: